WeakMap.prototype.delete()

This is a new technology, part of the ECMAScript 2015 (ES6) standard .This technology's specification has been finalized, but check the compatibility table for usage and implementation status in various browsers.

The delete() method removes the specified element from a WeakMap object.

Syntax

wm.delete(key);

Parameters

key

Required. The key of the element to remove from the WeakMap object.

Return value

Returns true if an element in the WeakMap object has been removed successfully.

Firefox-specific notes

Prior to SpiderMonkey 38 (Firefox 38 / Thunderbird 38 / SeaMonkey 2.35), this method threw a TypeError when the key parameter was not an object. This has been fixed in version 38 and later to return false as per latest ES6 standard (bug 1127827).